他换工作太频繁,我无法再跟上了。
He changes jobs so often I can’t ___keep ___track anymore.
一定要留意时间,以免迟到。
Be sure to ___keep ___track of the time so you won't be late.
试图通过翻译来跟踪这些变化将是不合适的任务。
Trying to ___keep ___track of these changes by translating them would be an inappropriate task.